Pumping-engine



(No Model.) 3 Sheets- Sheet 1.

E. ,E. CLARK. PUMPING ENGINE.

Patented Jan. 2, 1894.

n4: NATIONAL umoswwnmc COMPAMV.

wAsmNewN. a o.

(N o Model.) 3 Sheets-Sheet 3.

E. E. CLARK.

PUMPING ENGINE.

Patented JaJn. 2, 1894 UNITED STATES F'FIQEEZQ ATENT rumpmc encme.

SPEQIFICATIQN forming part of Letters Patent No. 512,010, dated January2, 1894:. Application filed February 20, 1893. Serial No. fl 62,963- (Nomodel.)

To all whom, it may concern:

Be it known that I, EZRA E. CLARK, a citizen of the United States,residing at Northampton,in the county of Hampshire and State ofMassachusetts, have invented anlmprovement in Vertical Compound BalancedDuplex Pumping-Engines, of which the following is a specification.

This invention is a modification of and improvement upon the device forwhich Letters Patent No. 358,591 were granted to me March 1, 1887.

In my present improvements I place the high pressure and expansioncylinders in line with each other, and I construct the pumps so as to bedouble acting and they are in line with the respective pairs ofactuating cylinders so that the power of each engine is exerted directlyupon its pump plunger and the parts are balanced and regulated in theirmovements by walking-beams, so that the englnes act in time, one withthe other, and the valves of one engine receive their movement from aconnection to the walking beam of the other engine and the parts arearranged in such a manner that the exhaust from one of the high pressurecylinders passes across to the larger and low pressure cylinder of theother pair of cylinders and these are moving together and near the endof the stroke change the valves so that the steam acts in the other highand low pressure cylinders to give motion to the same in the oppositedirection, thus rendering the compound engines duplex in their action,and the weights of the respective parts are balanced or nearly so inorder that there may be no loss of power and the parts standing verticalmove with but little friction, and the wear upon the respectivecylinders, stuffing boxes and journals is uniform or nearly so.

In the drawings, Figure 1 is a general vertical section. Fig. 2 is asection of the cylinders at the line as m Fig. 1. Fig. 3 is an endelevation. inders. Fig. 5 is a sectional plan at the line y 'y of Fig.1, and Fig. 6 is a sectional plan at the line a z.

The high pressure steam cylinders are represented at G and Handlowpress-ure steam cylinders at G H. The cylinders H and G are axiallyinline and so are the cylinders G and Fig. 4 is a plan of the steam cyl- Hand the steam at a high pressure is to be supplied by the pipes 10 andthe exhaust led away by the pipes 11 and there are diagonal pipes 12 and13 extending from the exhausts of the respective high pressure cylindersH and G to the valve chests of the respective cylinders H G.

The valves of these engines are to be of any suitable character. I haverepresented the same as the ordinary D slide valves and the valve rods15 16 17 18' to the respective valves are actuated as hereinafterdesignated in such a manner as to admit steam under 6 high pressurefirst to one cylinder G and then to the other cylinder H and the exhaustfrom the cylinder G goes by the pipe 13 to the valve chest of thecylinder G, and the exhaust from the cylinder H goes by the pipe 12 tothe valve chest of the cylinder H. The piston rod'Nof the cylinder H isconnected to a cross head 20 that is connected by links 21 to thecentral walking-beam M which is supported and works upon a cross shaft22 the ends of which shaft restin suitable bearings upon the frames orbeams L, and this piston rod N passes through the cross head 20 to asecond cross head 24. having rods 0 O that pass to the plunger B of thepump, as hereinafter described, and the cylinder G has rods 30 passingfrom the piston to the cross head 31, which cross head 31 has a rod Npassing through the middle of the plunger B and connected to the plungerB and there are links 32 from the ends of the cross head 31 to thewalking-beams M M which also have the shaft 22 for their support andupon which they are fixed. This shaft 22 works in bearings at the endson the frames L L. The 0 piston of the cylinder G has a piston rod Nthat passes through and is connected with the cross head 35 and passesdown through the plunger A and is connected with the plunger A and thepiston of the cylinder H has rods 40 passing down and connected with thecross head ll from which the rods 0 pass down and are connected with theplunger A and there are links 42 12 extending up from the cross head 41to theend of the central ICD walking beam M. Upon reference to Fig. 2itwill be seen that the rods 40 pass freely through the cross head 35,theholes for such rods being slightly larger than the rods in order thatthe movement may not be obstructed and the links 42 are connected withthe cross head 41 inside, and between the rods 40. The piston rod Npasses down within the notched end of the walking-beam M, see also Figs.3 and 5, and it passes freely through the cross head 41, and from theends of the cross head 35 there are links 44 to the ends of the leversor walking-beams M, andupon reference to Fig. 3 it will be seen that thepiston rod N passes freely through the notched end of the walking-beamM, and the links 32 are outside the rods 30 and are connected at theends of the cross head 31, and the rods 0 0 pass freely through holes inthe cross head 31, the objects of these arrangements beingv that theparts connected with the piston of the cylinder G may be moving in theopposite direction to the parts connected with the cylinder H and thatthe parts connected with the cylinder H may be moving one way while theparts connected with the piston of the cylinder G may be moving theother way and the walking-beamMis connected at one end to the piston ofthe cylinder H and at the other end to the piston of the cylinder H.Hence the pistons in H and H move together but always in the oppositedirections, and the piston of the cylinder G is connected at one end ofthe walking-beams M and thepiston of the cylinder G is connected at theother end of such walking-beams M. Hence the pistons of G and G movetogether but in the opposite directions and the parts are balanced bybeing connected at the opposite ends of the respective walking-beams. Itis preferable to key the walking-beams M upon the shaft 22 so that thesewalking beams and the shaft move together, and the walking beam M isprovided with a journal box or bearing upon this under side and swingsupon this shaft 22 as it moves with the other parts.

The valve rods 15 and 17 are connected at opposite ends of the rockerand there is an arm 51 to this rocker and a link 52 that connects therocker to the walking-beam M, and there is a rocker 55 to the ends ofwhich the valve rods 16 and 18 are connected, and there is a link 56connecting this rocker to one of the walking-beams M. Hence the valvesof the cylinders G and G receive motion from the walking-beam M and thevalves of the cylinders H and H receive motion from the walking-beams Mbut the piston of G is connected to M, and the piston of the cylinder His connected to M. Hence as the pistons of the respective cylinders moveand the piston of H completes its stroke, it moves the valves of thecylinders G G by the rocker 50 and connection to the walking-beam M, andthe piston of the cylinder G as it completes its strokes, moves thevalves of the cylinders H and H by the rocker 55 and the connection 56to the walking-beam M; the movements of the parts therefore will beinter-dependent and the high pressure steam will be admitted to one sideof the piston in the cylinder H as the steam passes from the other sideof the said cylinder through the pipe 12 into the cylinder H to move itspiston in the 0pposite direction, and the same movements take place inrelation to the pistons and valves of the cylinders G and G, and thevalves of G and G are dependent for their motion upon the movements ofthe pistons H and H, and the reverse, thereby not only are the partsbalanced in their action but they are duplexed and the steam is expandedeconomically andv there is no possibility of the engine stopping at anypoint so long as the proper pressure of steam is maintained; and Iremark that the plungers of the respective pumps are moved with the"respective pistons by the direct connections before described and theplunger in one pump 18 moving in the opposite direction to theplunger inthe other pump, and these plungers or plstons and the pumps may be ofany desired.

character or construction. I howeverprefer and make use of the pump nextdescribed. a

I have represented the double acting pumps as side by side and parallelwith each other, there being an inlet or suction pipe T and a dischargepipe U with branches extend ng to the respective valve chests of thepumps. The plunger A passes through the stuffing box 60. at the top ofthe valve chest of the pump A and the rod N passes through the stuttingbox 61 at the upper end of the plunger A and through a partition 62between the respective pump chambers A and A and is connected with theplunger A which passes through the stutting box 53, and the inlet valvesfor the pump chambers A are provided at 54 and the discharge valves at66 and those for the pump chambers A at 65 and 57, and the chambers B Bare constructed in a similar manner, and it is to be understood that theplungers A and B move simul taneously and in opposite directions asactuated by the pistons in the cylinders H and H, and that the plungersA and B move simultaneously and in opposite directions as actuated bythe pistons in the cylinders G and G. It however is to be understoodthat pistons may be made use of in placeof plungers in the respectivepumps and that any suitable character of duplex pump may be combinedwith this engine.

I claim as my invention- 1. The combination in a compound balancedduplex pumping engine, of the high pressure cylinders G and H in linewith the respective low pressure cylinders H G, the exhaust pipescrossing from the high pressure cylinders to their respective lowpressure cylinders to form the pairs of high and low pressure cylinders,the valves and valve rods for the respective cylinders, the rockersconnecting the valve rod of one high pressure cylinder with the valverod of theopposite low pressure cylinder, the walking-beams, links andpiston rods arranged substantially as specified and the connection fromthe walking-beam of one pair of cylinders to the rocker for the valvesof the other pair of cylinders, substantially as set forth.

2. The combination in avertical compound balanced duplex pumping engine,of high and low pressure cylinders axially in line, the pistons andpiston rods of the high pressure-cylinders in line with the pistons orplungers of the pumps and connected therewith, the pistons and pistonrods of the low pressure cylinders, the cross heads, links andwalkingbearns, connected and arranged substantially as specified, sothat the high pressure piston of one set of cylinders is connected withthe low pressure piston of the other set of cylinders and with one pairof pump plungers and the valves, valve rods, rockers and connections tothe respective walking beams for the valves of the opposite cylinders tobe moved simultaneously and by the engine that is completing its stroke,substantially as set forth.

3. The high pressure cylinders G and H in line with the respective lowpressure cylinders H G, the valve chest and valves for the respectivecylinders, the pipes 12 and 13 crossing from the exhaust of the highpressure cylinders to the valve chests of the low pressure cylinders, incombination with the rockers 50 and 55 and the valve rods connecting thevalve of one high pressure cylinder and ot the opposite low pressurecylinder, the walkingbeams M M and M and the shaft 22 for supportingsuch walking-beams, the pistons, piston rods, cross heads and linksconnecting the respective pistons at opposite ends of the walking-beams,and the double acting pumps with their plungers axially in line with thecompound engines and connected to the respective piston rods and crossheads, substantially as set forth.

Signed by me this 8th day of February, 1893.

EZ RA E. CLARK.

Witnesses:

EDWARD B. STRONG, TIMOTHY G. SPAULDING.

